Type Of Gas On Bmw X3

[phlukman]

Hi

I'm leasing a X3 2005, and have been putting 91 octane gas since the first day.
recently, a friend of mine told me that 89 octane will do as well, since if am not interested i buying the car after the lease, why should i care??
my question is:
do you guys think is this a good idea? i mean, i know that the manufacturer recommends 91 octane, but I am wondering whether there is any serious impact on mechanics, performance of the car.
cheers
P

[Bear]

I would use what BMW recommends for octane (owners manual and somet imes on filler cap).

[phlukman]

Originally posted by Bear@Jun 18 2005, 11:16 AM
I would use what BMW recommends for octane (owners manual and somet imes on filler cap).

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yeah, that what i've doing so far. but then again, i've read in the internet, that there're really no major differences between a 87 and 91 octane....
thanks for your input

[Bear]

No major mpact except to your wallet and if she needs 91 and you use 87 the knock sensor will retard the timing if pre ignition occurs and you will lose horsepower.

[phlukman]

Originally posted by Bear@Jun 18 2005, 12:22 PM
No major mpact except to your wallet and if she needs 91 and you use 87 the knock sensor will retard the timing if pre ignition occurs and you will lose horsepower.

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hi Bear

once again, thanks for your clarification.
cheers
P

[Zulu95]

I don't see much difference between any of the octane levels. Not exactly the autoban around here. I'd love to take the X somewhere I could legally open her up. I always took my 2002 for a 80 mile full throttle drive when I had it but I was part of the "Get Out of Jail Free" club then.

[Teh Prof]

Higher octane gas burns slower. This is a benefit in high-compression engines especially, allowing for more even-flowing combustion and decreasing the possibility of the fuel blowing up before it's supposed to. Your BMW has sensors ("anti-knock sensors") that will detect if that's happening with the lower octane gas and adapt to it; however, it won't run like it could--it'll have lower horsepower, and from my experience in my 528, noticeably lower.

[Angelic0-]

Since driving a X3 (such a heavy and poweless vehicle) i wouldn't think once, just go for it...

But it's funny to see octane numbers down to 89 there, the lowest octane we've got here in Iceland is 95, and we go up to 108

[Teh Prof]

Originally posted by Angelic0-@Jul 8 2005, 03:50 AM
Since driving a X3 (such a heavy and poweless vehicle) i wouldn't think once, just go for it...

But it's funny to see octane numbers down to 89 there, the lowest octane we've got here in Iceland is 95, and we go up to 108

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Actually, our lowest octane rating for "regular" tends to be 87.

[Angelic0-]

I've got an idea

Just bring all the coolest and neatest beemers to Iceland, and give them to me i will put them to better use, using 95+ oct